Monitor "show queuing interface" via SNMP on cisco Nexus 5596

[gpn-spb-cisco-access]

Hello community,

I have Cisco Nexus 5596 (NX-OS 7.3(3)N1(1)) and need to monitor via SNMP input queue drops per-group. 

In CLI i can see that counters in "show queuing interface" output:

N5K01# sh queuing int e1/45
Ethernet1/45 queuing information:
  TX Queuing
    qos-group  sched-type  oper-bandwidth
        0       WRR             80
        5       WRR             20

  RX Queuing
    qos-group 0
    q-size: 349760, q-size-40g: 0, HW MTU: 9216 (9216 configured)
    drop-type: drop, xon: 0, xoff: 349760
    Statistics:
        Pkts received over the port             : 31827244
        Ucast pkts sent to the cross-bar        : 10463665
        Mcast pkts sent to the cross-bar        : 21204117
        Ucast pkts received from the cross-bar  : 274248919
        Pkts sent to the port                   : 275527465
        Pkts discarded on ingress               : 159217
        Per-priority-pause status               : Rx (Inactive), Tx (Inactive)

    qos-group 5
    q-size: 90240, q-size-40g: 0, HW MTU: 9216 (9216 configured)
    drop-type: no-drop, xon: 17280, xoff: 37120
    Statistics:
        Pkts received over the port             : 191232557
        Ucast pkts sent to the cross-bar        : 189172897
        Mcast pkts sent to the cross-bar        : 2059135
        Ucast pkts received from the cross-bar  : 147376264
        Pkts sent to the port                   : 147376263
        Pkts discarded on ingress               : 512
        Per-priority-pause status               : Rx (Inactive), Tx (Inactive)

  Total Multicast crossbar statistics:
    Mcast pkts received from the cross-bar      : 1278782

Cisco SNMP Object Navigator says that i need to poll OID cbQosCMDropPkt64 (1.3.6.1.4.1.9.9.166.1.15.1.1.14) from OID table cbQosCMStatsTable (1.3.6.1.4.1.9.9.166.1.15.1), but my Cisco Nexus gives nothing from SNMP subtree 1.3.6.1.4.1.9.9.166.1.15.

In the output of "show policy-map interface" i see "policy statistics status: disabled", so i suggested that here is the problem.

N5K01# sh policy-map interface e1/45


Global statistics status :   enabled

Ethernet1/45

  Service-policy (qos) input:   QoS
    policy statistics status:   disabled

    Class-map (qos):   Prec5 (match-any)
      Match: precedence 5
      Match: cos 5
      Match: dscp 46
      set qos-group 5

    Class-map (qos):   class-default (match-any)
      Match: any
      set qos-group 0

  Service-policy (queuing) input:   QoS
    policy statistics status:   disabled

    Class-map (queuing):   Prec5 (match-any)
      Match: qos-group 5
      bandwidth percent 20

    Class-map (queuing):   class-default (match-any)
      Match: qos-group 0
      bandwidth percent 80

  Service-policy (queuing) output:   QoS
    policy statistics status:   disabled

    Class-map (queuing):   Prec5 (match-any)
      Match: qos-group 5
      queue dropped pkts : 512  queue received pkts : 192045540
      bandwidth percent 20

    Class-map (queuing):   class-default (match-any)
      Match: qos-group 0
      queue dropped pkts : 159251  queue received pkts : 91157289
      bandwidth percent 80

I've found document https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/qos/7x/b_5500_QoS_Config_7x/b_5500_QoS_Config_7x_chapter_011.html#task_8659666389717468953  where said that "policies need to be removed and re-applied, for statistics to take effect", but i have no policies on interfaces and reapplying policies in "

system qos" results nothing.

Can anyone help me to determine correct way to monitor queue drops via SNMP?